Ventillator



H. F. MARANVILLE.

VENIILATOR.

APPLICATION FILED MAY 25, I916. RENEWED OCT. 6,1919.

1 128,094, 1 Patented Jan. 13, 1920-.

v 'onrrn srar ANT FIG.

HARVEY F. MARANVILLE, 0F AKRON, OI-IIO.

VENTILATOR.

Application filed May 25, 1916, Serial No. 99,722. lienewed Qctober 6, 1913. Serial No. 328,925.

T 0 all whom it may concern:

it known-that T, l-ixnvny F. MARAN- YILLE, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Ventilators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to ventilators and more particularly to ventilators of the rotary cowl type which are adapted to discharge the exhausted air in a direction opposite to that from which the Wind may be blowing at anytime. Thegeneral objects of my invention are the-provision of a ventilator of this type which will provide a maximum aspirating effect with a corresponding maximum exhausting capacity; the provision of a device of this type of the maximum simplicity of construction and one in which the entrance of rain or snow into the air building shall be impossible; while additional objects and advantages will appear as the description proceeds.

Generally speaking my invention may be defined as consisting of the combinations and constructions recited in the claims hereto annexed and illustrated in one embodiment in the drawings accompanying and forming a part hereof, wherein Figure 1 is a vertical sectional view through a ventilator constructed in accordance with my invention; Fig. 2 is a transverse sectional view taken upon the line 22 of Fig. 1 and looking downwardly; Fig. 3 represents a front elevation of my improved ventilator; and Fig. 4: represents a side elevation of the complete ventilator.

Describing the parts by reference characters, 1 denotes a base member or roof fitting such as is usually employed with buildings for ventilating purposes. It is cylindrical in shape and is secured to the roof in any suitable or desirable manner. Pivotally secured above the open upper end of this base member is my improved cowl which is here shown as having a top plate 2, bottom plate 3, side plates shield 5, and vane 6. The bottom plate 3 is formed with a circular aperture 7 loosely receiving the projecting upper end of the base 1, and the sides 4.4 are spaced one on each side of this aperture as shown in Fig. 2, the portions of said sides adjacent the rear of the cowl preferably converging somewhat as shown at 88 to form a mouth 9, nhose vertical lip are preferably flared sidewise asshown at 10.10. The shield 5 is made of semi-circular shape and is secured in vertical position above the plate 3 so as to traverse the mouth 9 immediately at the edge of the opening 7 with its free edges 12-12 spaced from the portions 88 so as to provide elongated passageways 1313, arranged one at each side of the opening 7. The top member 2 is secured to the sides -i-i and to the top of the shield 5 so as to produce a very rigid arrangement. The lips 1212 of the shield are preferably arranged substantially abreast of the center of the opening 7, since at this point the rush of air through the openings 1313 produces a maximum of suction upon the air column. If these lips are projected farther toward the discharge mouth of the cowl the suction is decreased, while if terminated short of this point, rain and snow can find their way into the air shaft.

The top member 2 preferably overhangs the bottom member 3 at the discharge mouth of the cowl, so as to prevent rain and snow from beating into the air shaft, and also to guard against the ingress of any down draft such as frequently occurs in the neighborhood of high buildings. The entrance of rain and snow is also minimized by the extension of the base member 1 above the bottom member 3. The lips of the discharge mouth are preferably turned laterally as shown at 1515, which taken with the inclination of the 'side walls at this point, causes the air which passes outside the ven tilator to be thrown outward and also upward.

Any suitable or convenient arrangement can be employed for supporting the cowl in operative position. The simplest which I have conceived comprises a bridge member 20 traversing the upper end of the base member 1 and carrying a socket 21 of some nature, a vertical pivot shaft 22 carried by the top plate 2 and steadiedby a cross piece 23, said shaft having a pivot head engaging the socket 21, and a suitable bracing arrangement carried by the base 1 and engaging said shaft near its upper end, such for example as the metal strips 24-24: shown in the drawings.

With this arrangement I secure a maximum of aspirating action, without any posthe passageways 13-43 serving to overcome the inward eddying effect which is observed when no interior air passages are provided.

While I have described my invention in detail it will be obvious that many changes in construction could be made without departing from the scope of my invention, wherefore I do not limit myself except as described in the claims hereto annexed or required by the prior state of the art.

Having thus described my invention, what I claim is I 1. A rotary cowl for ventilators comprising a pair of upright side walls and a top member said side walls terminating at open inlet and outlet mouths arranged at opposite sides of said cowl and being tapered inwardly toward said inlet mouth beginning at a point substantially abreast of the pivot axis, and a concave shield depending from said top member within said inlet month, said shield having its convex face turned toward said mouth and having its free edges extending to points substantially abreast of the pivot axis and spaced from said side walls to define narrow passageways.

2. A rotary cowl for ventilators comprising a pair of upright side walls and a top member, said side walls terminating at open inlet and outlet mouths arranged at opposite sides of said cowl and being tapered inwardly toward said inlet mouth beginning ata point substantially abreast of the pivot axis, both inlet and outlet mouths being formed with flaring lips, and a concave shield depending from said top member within said inlet mouth, said shield having its convex face turned toward said mouth and having its free edges extending to points substantially abreast of the pivot axis and spaced from said side walls to define narrow passageways.

In testimony whereof, I hereunto affix my signature.

HARVEY F. MARANVILLE. 

